[CAMEL-11132] Provide type metadata for each Components/DataFormats

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 4.x
• Component/s: camel-core
• Estimated Complexity: Unknown
• Assignee: Tomohisa Igarashi
• Reporter: Tomohisa Igarashi
• Created: 10/Apr/17 14:11
• Updated: 09/Aug/23 09:27

Description

CAMEL-10447 has introduced InputType/OutputType declaration and declarative Transformer/Validator based on those types declared on a route.

Next step is to provide type metadata for each Components/DataFormats:

• Let components/DataFormats provide metadata about what data types are supported so that app developer can see
• Narrow down the possible data types (i.e. exclude unsupported types) and transformers when writing a route in IDE, allow IDE to show those candidates as a hint so that app developer can choose from. Also maven plugin could leverage those metadata
• Provide such facility from camel side so that the maven plugin and/or IDE can leverage it

Annotation would be an option, but it only provides static types. For example xslt component only consumes/produces XML so "XML" could be provided via annotation. But dozer component consumes/produces arbitrary data formats and the actual type to be used is determined via configuration, so it cannot be provided via annotation. It would need a common way to calculate possible input types and output types on a component/endpoint and dataformat from its configuration.

Sometimes even body of the input message would affect the possible output types. To visualize this we'll need some kind of simulation with a test message.

Issue Links

• is related to: CAMEL-18698 Add support for multiple data types on components
• is related to: CAMEL-17620 Document data type in body from the endpoints of each component
• relates to: CAMEL-330 Components / endpoints should advertise the data types they support